Automobile-muffler.



o. G. BOEGK. AUTOMOBILE MUFFLER. APPLICATION FILED FEB. 2, 1911.

Patented Sept. 5,1911.

QO ODOOQ OO W N mmw INVENTOR UNITED STATES PATENT OFFICE.

CHARLES G. BOECIQOF JACKSON, MIGHIGA'N, ASSIGNOR TO NOVELTY MANIl'FACTUBI1\lG CO., OF JACKSON, MICHIGAN, A CORPORATION OF MICHIGAN.

AUTOMOBILE-MUFFLER.

T0 all-whom it may concern:

Be it known that I, CHARLES G. Boncn, a citizen of. the United States, residing at Jackson in the county of Jackson and State of Michigan, have invented certain new and useful Im rovements in Automobile-Muf-. flers, of which the following is a specification. a

This invention relates to devices for mufllin the noise caused by the exhaust of exp osive engines used on automobiles and other motor vehicles, and the obect of the invention is to provide a simple, e 'c ie'nt,

durable, and inexpensive device of the character referred to, which will occupfy a small space on the vehicle andtwill be ree from t e objectionable weight present inmost mufilers heretofore known.

A further object of the invention is to provide a muffler which may be readily applied to an motor vehicle, and which will i so . casin at opposite provide with a cut-out so located as to avoid any complicated construction of the muffler oriof the exhaust pipe.

Other incidentaLobjects of the invention will appear from the following description.

:The invention resides in; certain novel features of construction and arrangement, a.

preferred form'of which is illustrated in the accompanying drawings, and will be hereinafter first fully described, and then more artie-ularly "pointed out in the appende' claims;

In said drawings, Figure 1 is a view of a Inn-filer embodying my im rovelnents, showing the samepartly in sice' elevation and partly "in longitudinal section. Fig. 2 is a-transverse section on the line 2-2 of Fig. 1; Fig. 3 is an end elevation looking at the .inlet end of the Inufller; Fig. 4 IS a detail perspectiveyiew of the core; Fig. 5.

is a detail plan view of the inlet endof the,

em loy atubule ;leasing. or..-cy1-i;nder 1,. one

en" ef whichiiis closed.=.=by.a cap or ,other 3". 'Ihe opposite enduofi;the casing or veylinder 1 is open and slit longitudlnallfaas chem st 4:, 'andj ,npon 1thelbuten :side 0 the I sides ofthe saidsllt, I: yr secum togithegicasinggiahrackets 5- which a clamping bolt 6 1s inserted,

through a nut 7 being mounted on the end of the Specification of Letters Patent.

Application flled'lebruery 2, 1911'. Serial No. 806,233.

Patented Sept. 5, 1911.

bolt so that when the said nut is turned home against the adjacent bracket 5, the brackets will be drawn togetherland the end of the tube firmly clamped around the end of the exhaust pipe 8, as will be readily understood. By reason of this construction I am enabled to secure mymulller directly on the end of any exhaust pipe without requiring acomplicated series ot' connections, and, as the cylinder is but sligl'itly larger than the exhaust tube in its diai'nctrical dimension, it forms practically a continuation of the exhaust pipe and will add very slightly to the weight of the vehicle, whereas a considerable dead weight is imposed u )011 vehicles by the large, cumbersome mufilers now in general use. 7

On the under side of the casing or'cylinder 1, adjacent the inlet end thercofifll provide a cut-out, valve consisting of'a disk 9 carried the end of a lever 10 and adapted to seat against a bracket 11 secured rigidly to the casing and'projecting laterally from the same, as clezu-lyshown'in Figs. 2 and 3, said bracket having an opening leading into the casiugz] The lever 10 is pivotally attached between. its. ends to depending ears 12 of the brac'lcctffhe' free end of the lever being pivotally connected to the lower end of an operating rod 13 extending up into the body of the vehicle and fitted with means whereby it may be, readily manipulated by the chauffeur.

The valve 9 consists of a disk swiveled oi' otherwise loosely attached to the end of the 'lever 10 by a screw 14, su'flicient play being provided between the disk and the headfof the screw to permit the valve to automatically seat itself squarely against" the walls of the opening in the bracket 11 as the lever swings toward the said opening. I thus obtain a perfect, ti ht closure, so that when it is desired to muliie the exhaust to prevent the rapidescapc ofthe gases, the valve may bepermitted to rema naga nstitsseat and accomplish the desiredjresult with certainty. Ill-ievalve is norn iallyheld. againstfits by a spring 15 extending ibetwcen the l'e er and a. pin 16 or,.other; fixed? part ofltlije b ac as h wn l rl m ri is desired to permit thegases ,to escape raj idly and directly without passing entire y ;through- V the, muflier, the operating" rod! 13 is manipulated so as to swin'g the valve 9 away from itsseat and'thus permit the direct escape ofthespent gases, as W111 be understood. It will be observed that. the cut-cutie arrangcd directly on the muffler casing adjacent t e inletend thereof so that no alteration of the exhaust pipe already on the engine is needed, and no peculiar com-v plicated connections required; The mutilcr casing forms a part of the cut-out and the exhaust gases pass directly through the casing to the outside air from the engine exhaust pipe.

It frequently happens, especiall in cranking or starting a machine, that ack firing or an ex losion of gases occurs in the muflier, and mu ers have often been blown to pieces by the force of such explosion, because the cut-out valve was located either on the on gine exhaust pi e or at a point so remote therefrom that t e explosive pressure exerted no force thereon. In my resent device, the cut-out valve is so locate that the force of an explosion will press open the valve and permit the gases to escape so that damage to the mufller can not occur. 7

Removably fitted within the tubular casing or cylinder l-is a core consistin r of a plurality'of longitudinal baflles 17 which are arranged to extend diametrically across the interior of the casin and which, in the present instance, are s own as consistin of two plates of sheet'metal bent into V- orm in cross section and riveted to ether at their apexes so as to provide a rigi structure. The outer edges of the battles are formed into flanges 18 which bear against the inner wall of the cylinder and therebyavoid the cutting of the cylinder or the wearing of rooves therein, and also serve to prevent uckling of the ballles as they are inserted or withdrawn, or. tend to expand or contract. under the variations in the tem erature occasioned by the use and disuse o the vehicle. One of the battles, indicated at 19, is imperforate throughout its length, while the other battles are provided with transverse perforations 20 and the said perforations successivel .decrease in area from one end of each ba e to the opposite end,-'thelarger perforations in the alternating baffles being at o posite ends of the same, as will be readlly understood, and as shown in the drawings. At the inlet end of the core, I

provide a closure 21, which is secured to the batlles, and is of a segmental form, so that the space between the lmperforate ballie 19 and one-of the adjacent perforated battles is left unbridged, while the remainingspace is bridged by the said closure, and, conseg uently, the incoming exhaust gases are orced to enter the muffler between the imperforatei bafile and the perforated baffle most rcmotefrom the discharge openings 3, as will be readily understood from the drawings. The core is inserted in the casing in such position that the unbridged portion thereof will be out of alinement with the dischar e openings 3 in the casing, and consequently the ases cannot pass directlyto the said openings. It will also be noted that the perforations in that batlie which forms one side of the inlet passage are largest at the entrance end, while the largest perforations in the next baffle, roceedlng in a circular path around the casing, are at the closed end ,of the casing. T

The exhaust ases passin into the muffler between the un ridged ba es will travel to the closed end of the mufiier under the pressure from the engine and will gradually expand so as to lose some of their force.

The gases are thrown back by the impact against the closure 2 and will then escape through the perforations 20 into the second section or chamber of the muflier, and inasmuch as the perforations now encountered successively increase in area in the opposite direction, the great volume of the gases will be forced to travel toward the closed end of the casin a second time before escaping into the thir section or compartment of the ,or remaining sect-ion of the mufiler, .and

openings 3 in the casing, as will be readily .understood. It will be noted that the gases have a circulation in a circular direction around the interior of the mufller, and also have a tortuous circulation lon 'tudinally of the same, so that by thetime t ey reach the discharge openings 3, they are expanded to their origlnal tension, and will consequently pass through the discharge 0 nings without any noise. Inasmuch as t e tortuous 'cirduce their velocity while at the same time preventing their accumulation in any one corner or angle of the device, the back pres sure upon the engine is reduced to a mini mum.

It will be further noted that the core con- ,sisting of the bafiles and the se mental closure at the inlet end of the same 1s removable as an entirety so that repairs may be easily made audit will not be necessary to supply an entirely new mufller should any one of the battles become defective for an reason.

while at the same time reducing the cost, inasmuch as the casing may be-made from any ordinary tubing, and the core simply moved longitudinally thereinto; lVhen in within the casing and will extend from the cap 2 against which it abuts to a point near the cut-out. I

Having thus described my invention, what I claim is:

1. A muifler comprising a cylinder having thence finally escape through the discharge culation and expansion of the gases will reuse, the core will be held firmly in place ,muiiler. The gases then pass into the fourth such a degree as to lose substantially all of This removability of the core, furt ermore,- facilitates the construction of the device,

, in, all said battles terminating short of the open frontend of the cylinder and abutting t e rear closed end thereof.

2. A niulller comprising a. tubular casing,

' a'plurality of batlles disposed longitudinally within-the casing and meeting at the axial center thereof, and means whereby the gases within the casing are given a tortuous circulation between the battles while passing around the interior of the casing.

3. A mufller com rising a tubular-casing, and a plurality o diametrical batlles disposed longitudmally within the casing and extending entirely across the same.

4. A mutiler comprising a tubular casing having a closed outer end and a series of dis-- charge openin 8 near said end, a plurality of baflies disposed longitudinally within the easing and comprising a perforated and an imperf orate battle spanning the discharge openlngs, and a segmental closure bridging the space between the inner ends of said baflles.

5. A nutlier comprising a tubular casing having ischarge openings near one end and an inlet at the 0p osite end, a longitudinal ilnperforate bei e within the casing between the inlet and the discharge openings, and a plurality of longitudinal perforated ballles, the perforations in said bafflesincreasing successively in areadrom opposite ends of alternate batilesi ilttheir apeXesJ- 6. A mulller comprising a tubularcasing,

and a removable core slidably fitted in the casing and comprising a plurality of longit udinal ballles.

7. A. mulller comprising atubular casing, and a removabltj 'core,slidably fitted in the casing and comprising a plurality of longitudinal ballles, and a closure bridging some of the battles at one end of tlie core.

8. A muliler comprising a tubular casing, and a removable core slidably fitted in the casing and comprising a plurality of longi ludinal battles, one of said battles being imperforate and the remaining ballies having transverse perforations increasing suceessively in area from opposite ends of the alternate ballles. I

9. A mulller comprising a tubular casing having a closed outer end and an open inner end. and a core fitted within the casing a gainst the closed end and removable bodily through the open end thereof and having a partly closed inner end and comprising a plurality of longitudinal batiies.

.lt). A' muliler comprising a tubular casing. and a core fitted therein and consisting of a pair of longitudinal plates V-shaped in L'russ section and rigidly secured together 11. A mufiier comprising a tube having a split end adapted to engage over the end of an exhaust pipe, brackets rigidly secured on the tube at opposite sides of the split end, a securing bolt inserted through the said brackets, and a plurality of longitudinal bafiles within the casing.

12. A inuflier comprising a tubular casing having an inlet at one end, batlies therein terminating short of said inlet and a cutout valve located on the side of the casing adjacent the inlet end thereof.

13. A muffler consisting of a tubular casing, a lurality of baflles therein, a bracket secure to the side of the casing and having an opening therethrough leading laterally to the interior of the casing, a lever pivoted between its ends to the outer end of said bracket, a valve disk loosely fitted on the inner end of said lever and adapted to seat externally against the bracket over the opening therein, and a spring secured to the lever and the said bracket to hold the valve normally seated.

14. A mutiler comprising a tubular casing, and a core relnovably fitted therein, said .core consisting of. a pair of plates V- shaped in cross-section rigidly secured together at their apexes, and a segmental closure secured to said core at one end of the same, said closure being arranged to leave one space'tformed by said plates unbridged.

15. A niufiler comprising a tubular casing, and a removable core adapted to fit therein, said core consisting of a air of longitudinal plates V-shaped in c1 ss-section and secured rigidly together at their and terminating at the perforated branch of the first mentioned, plate.

, 16. A niutiler comprisin ing an inlet atone end, aflies within the a cylinder havcylinder terminating short of said inlet, a

discharge remote from the inlet, and a cutout valve on 'the side of the cylinder between said inlet and s'aid bafiles. r

In testimony whereof I atlix my signature, in presence of two witnesses.

CHARLES G. BOECK.

Witnesses D. R. Taannm'i,

G. D. HAWKINS. 

